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Such winds are sometimes also called fall winds; the spelling catabatic winds [1] is also used. Katabatic winds can rush down elevated slopes at hurricane speeds, but most are not that intense and many are 10 knots (19 km/h; 12 mph) or less. Not all downslope winds are katabatic. For instance, winds such as the föhn and chinook are rain shadow ...
The Santa Anas are katabatic winds (Greek for "flowing downhill") arising in higher altitudes and blowing down towards sea level. [7] The National Weather Service defines Santa Ana winds as "a weather condition [in southern California] in which strong, hot, dust-bearing winds descend to the Pacific Coast around Los Angeles from inland desert regions".
At night, the process is reversed. During the night the slopes get cooled and the dense air descends into the valley as the mountain wind. [4] These breezes occur mostly during calm and clear weather. Mountain and valley breezes are other examples of local winds caused by an area's geography.
Red flag warnings are in place for Southern California due to Santa Ana winds that will bring gusts up to 65 mph and “extremely rare and dangerous” fire weather conditions. Red flag warnings ...
Wind gusts could reach up to 70 mph on Tuesday in the mountains, and relative humidity will be between 5% and 10%. Winds will decrease by Wednesday afternoon. However, the humidity will stay ...
Santa Ana winds and, their Bay Area cousin, the Diablo winds occur when air from a region of high pressure over the dry Great Basin region of the U.S. flows westward toward lower pressure located ...
Berg wind, a seasonal katabatic wind blowing down the Great Escarpment from the high central plateau to the coast in South Africa. Cape Doctor , often persistent and dry south-easterly wind that blows on the South African coast from spring to late summer (September to March in the southern hemisphere).
However, the strong winds of the jet are a localised feature. Early modelling studies concluded that the jet forms as a result of orographic channelling (i.e. Bernoulli's principle). [3] [4] More recently, it has been proposed that the night-time strengthening of the jet is a consequence of orographic downslope winds (i.e. Katabatic wind). [5]